Overnight Youth Serum by Kérastase is an age-corrective night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse the visible signs of aging during night time.
Targeting dryness, dullness,frizz, lack of volume and thickness, this leave-in serum delivers intensive overnight care. Just one pump to deliver powerful actives deep into the hair.
Powered by Pro-Xylane™, a green chemistry molecule known for its ultimate anti-aging action, and Ochrophyta Algae, the fastest growing algae in the world, a bio-sourced deep sea treasure that captures the regenerative power of the ocean.
Its transformative quick-break texture melds instantly into the hair's lengths, leaving a perfect finish and enveloping the hair with the signature Chronologiste fragrance that turns routine care into a luxurious ritual.
HAIR BENEFITS AFTER 1 NIGHT
INCREASES FIBER DIAMETER BY +5.7%*
-66% FRIZZ*
+32% SHINE*
+92% MORE STRENGTH *
77% SAY THEIR HAIR FEELS REVITALIZED**
*Instrumental test after 1 use of Overnight Youth Serum
**Consumer test after one application of full Chronologiste routine, bain+masque+Overnight serum
BENEFITS
Nourishes Hair
Shiny Hair
Brings Volume
Luxurious Care
YOUTH REVITALIZING CARE
REVERSES 5 SIGNS OF AGING IN 1 NIGHT*
WAKE UP TO FULLER, SMOOTHER, HEALTHIER HAIR
Like your skin, hair is aging too. After decades of scientific rsearch, Kérastase has decoded the science behind hair aging. Chronologiste brings skincare science to haircare, promising to reverse the 5 visible signs of aging*
*dryness, dullness, lack of volume and thickness, and frizz.
YOUTH REVITALIZING CARE.
Overnight Youth Serum by Kérastase is an age-corrective night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse the visible signs of aging during night time.
Targeting dryness, dullness,frizz, lack of volume and thickness, this leave-in serum delivers intensive overnight care. Just one pump to deliver powerful actives deep into the hair.
Powered by Pro-Xylane™, a green chemistry molecule known for its ultimate anti-aging action, and Ochrophyta Algae, the fastest growing algae in the world, a bio-sourced deep sea treasure that captures the regenerative power of the ocean.
Its transformative quick-break texture melds instantly into the hair's lengths, leaving a perfect finish and enveloping the hair with the signature Chronologiste fragrance that turns routine care into a luxurious ritual.
HAIR BENEFITS AFTER 1 NIGHT
INCREASES FIBER DIAMETER BY +5.7%*
-66% FRIZZ*
+32% SHINE*
+92% MORE STRENGTH *
77% SAY THEIR HAIR FEELS REVITALIZED**
*Instrumental test after 1 use of Overnight Youth Serum
**Consumer test after one application of full Chronologiste routine, bain+masque+Overnight serum
BENEFITS
Nourishes Hair
Shiny Hair
Brings Volume
Luxurious Care
YOUTH REVITALIZING CARE
REVERSES 5 SIGNS OF AGING IN 1 NIGHT*
WAKE UP TO FULLER, SMOOTHER, HEALTHIER HAIR
Like your skin, hair is aging too. After decades of scientific rsearch, Kérastase has decoded the science behind hair aging. Chronologiste brings skincare science to haircare, promising to reverse the 5 visible signs of aging*
*dryness, dullness, lack of volume and thickness, and frizz.
Step 1: Before bedtime, your hair can be either dry or damp.
Step 2: Take one pump of the Overnight Youth Serum into your hands.
Step 3: Gently spread the serum between your palms and distribute it evenly through the lengths and ends of your hair. There's no need to apply it directly to the scalp unless specified for specific concerns.
Step 4: Do not rinse in the morning. Let the serum work its magic as you sleep
B/A PRODUCT CAROUSEL
BEFORE / AFTER
Illustration of the contemplated results obtained after applying:
Continuous exposure to daily environmental and mechanical aggressions leads to a progressive ageing of the hair fiber, consequently contributing to an overall aged appearance. Given that hair, akin to skin, serves as a prominent visual indicator of age, its compromised condition can significantly impact an individual's self-perception and confidence.
To address these concerns, Kérastase has identified 5 signs of hair ageing - frizz, dullness, lack of thickness, lack of volume and developed a targeted regimen, including an innovative night serum, designed to visibly improve these signs.
KEY INGREDIENTS
Pro-Xylane™
A powerful bio-derived sugar molecule that boosts hair thickness and density by stimulating cellular activity within the scalp and hair follicles.
Ochrophyta Algae
A bio-sourced marine extract rich in regenerative minerals, protecting hair against daily agressors and providing deep revitalization.
AQUA / WATER / EAU
•
•
•
•
•
• C13-14 ISOALKANE
•
•
•
•
•
•
• CARVONE
• CITRUS AURANTIUM PEEL OIL
•
• POGOSTEMON CABLIN OIL
•
• LINALYL ACETATE
•
•
• MACROCYSTIS PYRIFERA EXTRACT / KELP EXTRACT
•
• BENZALDEHYDE
•
•
•
• TRIMETHYLBENZENEPROPANOL
• ROSE KETONES
•
• BETA-CARYOPHYLLENE
•
•
•
CAVIAR OF LONGEVITY
Continuous exposure to daily environmental and mechanical aggressions leads to a progressive ageing of the hair fiber, consequently contributing to an overall aged appearance. Given that hair, akin to skin, serves as a prominent visual indicator of age, its compromised condition can significantly impact an individual's self-perception and confidence.
To address these concerns, Kérastase has identified 5 signs of hair ageing - frizz, dullness, lack of thickness, lack of volume and developed a targeted regimen, including an innovative night serum, designed to visibly improve these signs.
Pro-Xylane™
A powerful bio-derived sugar molecule that boosts hair thickness and density by stimulating cellular activity within the scalp and hair follicles.
Ochrophyta Algae
A bio-sourced marine extract rich in regenerative minerals, protecting hair against daily agressors and providing deep revitalization.
AQUA / WATER / EAU
•
•
•
•
•
• C13-14 ISOALKANE
•
•
•
•
•
•
• CARVONE
• CITRUS AURANTIUM PEEL OIL
•
• POGOSTEMON CABLIN OIL
•
• LINALYL ACETATE
•
•
• MACROCYSTIS PYRIFERA EXTRACT / KELP EXTRACT
•
• BENZALDEHYDE
•
•
•
• TRIMETHYLBENZENEPROPANOL
• ROSE KETONES
•
• BETA-CARYOPHYLLENE
•
•
•
FRAGRANCE
TOP NOTES
FREESIA, ROSE & MARINE NOTES
HEART NOTES
BERGAMOT, ORRIS & GREEN NOTES
BOTTOM NOTES
MUSK ACCORD, WHITE FLOWERS & PATCHOULI
FRAGRANCE
PARIS COUTURE
The Chronologiste fragrance is a revitalizing & senusal fragrance, embodying a blend of modernity with retro-classic influence.
PARIS COUTURE
TOP NOTES
FREESIA, ROSE & MARINE NOTES
HEART NOTES
BERGAMOT, ORRIS & GREEN NOTES
BOTTOM NOTES
MUSK ACCORD, WHITE FLOWERS & PATCHOULI
The Chronologiste fragrance is a revitalizing & senusal fragrance, embodying a blend of modernity with retro-classic influence.
Eco Stamps SVG + Tag
Biodegradable Formula*
*as per OECD 301 or equivalent tests
Parabens Free
Artificial Colorant Free
20% Recycled Glass*
*except cap and pump
Recyclable Bottle
Made in a waterloop factory
PDP Section FAQs
FREQUENTLY ASKED QUESTIONS
Do I need to rinse it out in the morning?
No. The formula is designed to be leave-in and absorbs fully overnight with no residue.
Can I use it on both wet and dry hair?
Yes. It can be applied to dry or towel-dried hair as the final step of your evening routine.
Will it make my pillow greasy or sticky?
No. The quick-break texture absorbs instantly, leaving no residue on fabric or hair surface.
What is the scent of this serum?
Chronologiste owns a signature Parisian couture scent, a revitalizing and sensual fragrance.
What are the benefits of this serum?
It reverses 5 signs of hair aging in 1 night and reveals fuller, healthier and smoother hair.
B/A PRODUCT CAROUSEL 
